Suramin's Development: What Did we Learn?
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Suramin, a polysulphonated napthylurea, has been extensively evaluatedover the past 10 years as an anticancer agent, with the most interest inthe treatment of prostate cancer. Early clinical results were promisingwith response rates of up to 70% being reported. However, a recentdouble-blind study showed only modest palliative effect in patients withandrogen independent prostate cancer. In retrospect, it appears thoseinitial reports failed to control for confounding variables such asantiandrogen withdrawal and hydrocortisone.
Suramin causes numerous reversible toxicities (lethargy, rash, fatigue,anemia, hyperglycemia, hypocalcemia, coagulopathies, neutropenia, renaland hepatic complications). Neurotoxicity has been the most significantcomplication and appears to be related to the intensity of the dosingregimen. An optimal therapeutic dose has not been determined, but it isclear that adaptive controls add little benefit.
Aside from moderate toxicities and the low therapeutic index in patientswith prostate cancer, suramin's development has taught us some valuablelessons (i.e., anti-androgen withdrawal was noted during suramin'sdevelopment, the use of PSA as an indicator of tumor burden was initiatedduring the evaluation of suramin). These lessons can be applied to allclinical trials in hormone refractory prostate cancer. Suramin hassignificantly enhanced the evolution of our knowledge in several areas ofprostate cancer biology and treatment.
- Suramin's Development: What Did we Learn?
Investigational New Drugs
Volume 20, Issue 2 , pp 209-219
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers
- Additional Links
- prostate cancer
- Industry Sectors
- Author Affiliations
- 1. Molecular Pharmacology Section, Cancer Therapeutic Branch, Center for Cancer Research, National Cancer Institute, National Institute of Health, Bethesda, MD, USA
- 2. Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV, USA
- 3. Stanley Scott Cancer Center, Louisiana State University, New Orleans, LA, USA
- 4. Molecular Pharmacology Section, Cancer Therapeutic Branch, Center for Cancer Research, National Cancer Institute, National Institute of Health, Bethesda, MD, USA